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Bentonine shielding of rock-deposited redioactive wastes
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
1983 (English)In: Nuclear Waste Management Program: summary report / [ed] Riley M. Chung, Washington, 1983, 112-124 p.Conference paper (Refereed)
Abstract [en]

The Swedish KBS concepts for final deposition of canisters with nuclear wastes from reactors, imply that the canisters be placed in deposition holes which are bored from the floors of tunnels at about 500 m depth in Swedish crystalline bedrock. The canisters are isolated from the rock by a ″buffer mass″ consisting of pure bentonite in the case of unreprocessed wastes, and the deposition plant is finally sealed by backfilling shafts and tunnels with bentonite/sand mixtures. The bentonite, which surrounds the canisters, is applied in the form of blocks of highly compacted bentonite. The blocks are produced by isostatic compaction of commercial bentonite powder under pressures in the range of 50-100 MPa, which yields block densities of 2. 1-2. 2 t/m**3 when using Wyoming Na bentonite MX-80 powder. The compacted bodies are cylindrical and they can be manufactured by sawing, drilling etc. so that cylindrical discs, rods, annuli, and practically any shape can be obtained. The particularly attractive properties of the highly compacted Na bentonite are reported

Place, publisher, year, edition, pages
Washington, 1983. 112-124 p.
NBS Special Publication, 668
Research subject
Soil Mechanics
URN: urn:nbn:se:ltu:diva-34974Local ID: 94dbf0d2-6bda-4192-9efa-92955c101fd7OAI: diva2:1008226
Workshop on research and development needs in backfill for long term storage of nuclear waste in deep geologic repositories : 13/04/1981 - 14/04/1981
Godkänd; 1983; 20120626 (andbra)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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